只 一行显示可左右滚动的文本(UITextField中文限制)

//
//  ViewController.m
//  一行显示可滚动的文本
//
//  Created by apple on 15-5-8.
//  Copyright (c) 2015年 apple. All rights reserved.
//

#import "ViewController.h"

@interface ViewController () {
UIScrollView *_scrollView;
UITextField *_textField1;
NSInteger _indextext;
}
@end

@implementation ViewController

- (void)viewDidLoad {
[super viewDidLoad];
_scrollView = [[UIScrollViewalloc]initWithFrame:CGRectMake(70,CGRectGetHeight(self.view.bounds)/2,CGRectGetWidth(self.view.bounds) - 100, 30)];
_scrollView.showsHorizontalScrollIndicator = NO;
_scrollView.showsHorizontalScrollIndicator = NO;
_scrollView.bounces = NO;
_scrollView.layer.borderWidth = 1;
[self.view addSubview:_scrollView];

NSMutableAttributedString * attributedStr4 = [[NSMutableAttributedStringalloc]initWithString:@"请输入约会内容"];
[attributedStr4 addAttribute:NSForegroundColorAttributeName value:[UIColor grayColor] range:NSMakeRange(0, attributedStr4.length)];
_textField1 = [[UITextField alloc]initWithFrame:CGRectMake(0,7,CGRectGetWidth(self.view.bounds) - 100, 15)];
_textField1.textAlignment = NSTextAlignmentRight;
_textField1.text = @"";
_textField1.textColor = [UIColor grayColor];
_textField1.font = [UIFont fontWithName:@"Helvetica-Bold" size:13];
_textField1.attributedPlaceholder = attributedStr4;
[_textField1 addTarget:self action:@selector(textFieldEditChanged:)forControlEvents:UIControlEventEditingChanged];
[_scrollView addSubview:_textField1];
_scrollView.contentSize = CGSizeMake(CGRectGetWidth(_textField1.bounds),30);

}
- (void)textFieldEditChanged:(UITextField *)textField
{
if (CGRectGetWidth(_textField1.bounds)  >=CGRectGetWidth(self.view.bounds) - 100) {
_scrollView.contentSize =CGSizeMake(CGRectGetWidth(_textField1.bounds),30);
NSLog(@"%.2f",_scrollView.contentSize.width);
if (_indextext != _textField1.text.length) {
[_textField1 sizeToFit];
[_scrollViewsetContentOffset:CGPointMake(CGRectGetWidth(_textField1.bounds) -CGRectGetWidth(_scrollView.bounds), 0) animated:NO];
_indextext = _textField1.text.length;
}
}
else {
_textField1.frame = CGRectMake(0, 7,CGRectGetWidth(self.view.bounds) - 100, 15);
[_scrollView setContentOffset:CGPointMake(0, 0) animated:NO];
_scrollView.contentSize = CGSizeMake(CGRectGetWidth(self.view.bounds) - 100,30);
_indextext = _textField1.text.length;

}
if (_textField1.text.length > 36) {
_textField1.text = [_textField1.text substringToIndex:36];
}

}

@end

补1：我这方法其实很笨，大家有好的方法共享出来，共同进步！

补2：textfield加个状态监听器-限制中文

- (void)viewDidLoad
{
[_textField addTarget:self action:@selector(textFieldEditChanged:) forControlEvents:UIControlEventEditingChanged];

[super viewDidLoad];
}

- (void)textFieldEditChanged:(UITextField *)textField
{
NSLog(@"textField text : %@", [textField text]);
}

这样，无论是字母还是中文，都能动态获取

上面的中文限制是有bug的当你一直输入拼音不选择汉子到一定数量汉字联想自动关闭了

修改后链接：

/article/5254421.html